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Jaybird 3.0.9 has been released. This release contains the following changes:

Fixed: changes to the transaction configuration (transaction parameter buffer configuration) of one connection are no longer propagated to other connections with the same connection properties (JDBC-386)

Jaybird 4 is - compared to Jaybird 3 - an incremental release that builds on the foundations of Jaybird 3.
The focus of this release has been on further improving JDBC support and adding support for the new data types and features of Firebird 4.

We’d really appreciate it if you take the time to test this version of Jaybird with your applications.
Bug reports about undocumented changes in behavior are appreciated.
Feedback can be sent to the Firebird-java mailing list or reported on the issue tracker http://tracker.firebirdsql.org/browse/JDBC.

Jaybird 4 is - compared to Jaybird 3 - an incremental release that builds on the foundations of Jaybird 3.
The focus of this release has been on further improving JDBC support and adding support for the new data types and features of Firebird 4.